Double-facer for corrugated-paper machines.



J. DUNFBE. DOUBLE FACER' POR GOBRUGATED PAPER MAUHINES.

-APPLIATION FILED 00T.7, 1910. 982,176. Patented Jan. 17, 1911 aYsums-SHEET 2.

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"jJQ-DUNFBB-', DOUBLE PAcEnfoR GORBUGATBD PAPER MACHINES. APPLIoA'rIoNr1LnnooT-7, 1910. 1 -v 982,176, Patented Jan. 17,1911.

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NETE@ STATES FATFNF QFFCE.

JESSE IDUNFEE, 0F COSHOCTON, OHIO, ASSIGNOR OF ONE-HALF TO SUSAN RNNER,OF COSI-IOCTON, OHIO.

DOUBLE-FACER FOR CORRUGATED-PAPER MACHINES.

Specication of Letters .Patent Patented Jan. 1"?, 1911.

Application led October 7, 1910. Serial No. 585,868.

To all whom it may concern:

Be it known that I, Jnssn DUNFEE, a citizen of the United States,residing at Coshocton in the county of Coshocton and State of Ohio, haveinvented certain new and useful Improvements in Double-Facers forCorrugated-Paper Machines, of which the following is a specification.

My invention relates to facing corrugated paper, that is, for applyingoppositely disposed sheets of plain paper to a middle corrugated web,pressing said sheets into contact with the web and simultaneously dryingthe same, thus forming a cellular sheet of pasteboard having outer plainfaces.

In particular, my invention relates to mechanism for pressing the sheetsof plain paper into contact with the corrugated sheet and subjecting toheat so as to cause the outer sheets to adhere to the corrugated web,while simultaneously feeding forward the combined cellular sheet soformed.

The primary object of the invention is the provision of improved meansfor simultaneously heating, pressing and feeding the combined sheetswhereby the sheets are pressed between reciprocating platens or chestshavinv a relatively large area and fed forward wit i the forwardmovement of the platen, thereby subjecting the board to a very uniformpressure over a large surface and doing away with the constantvariations in pressure incident to pressingrollers.

A still further object is to provide means whereby these platens may bespaced from each other such distance to permit the platens on a returnmovement, when they slide over the paper, to be adjusted so as toentirely relieve the paper of pressure, or to be adjusted so that anironing action may be given to the paper, these adjustable stops wherebythis result is attained also providing means for preventing the platensmoving into too close proximity to each other and thus crushing thepaper between them.

Further objects of the invention will appear in the course of thefollowing description My invention is shown in the accompanying drawingswherein:

Figure 1 is a side elevation of a facing machine constructed inaccordance with my invention. Fig. 2 is a plan view thereof, partlybroken away and partly in section. Fig. 3 is an enlarged fragmentaryperspective view of the platens removed from the supporting bed. Fig. 4is a cross section on the line 4 4 of Fig. 1. Fig. 5 is an enlarged sideelevation, partly broken away of a portion of the supporting bed and apair of platens thereon.

Referring to these drawings 2 designates a supporting bed constructed inany suitable manner and provided with the legs 3 and with the sideplates or bars 4 which exenld longitudinally the whole length of theExtending parallel to the bars 4 and spaced therefrom are thelongitudinal bars or plates 5 which are attached to the ends of the bedor frame 2, and supported between the bars 4 and the bars 5 are the twosets of antifriction rollers 6. It will be seen that the longitudinalbars 5 5 are spaced apart from each other a suitable distance so as toprovide a longitudinally extending opening for a depending bracket onthe lower platen of each pair of platens.

Supported on the rollers 6 are a plurality of pairs of pressing platens,each pair of platens comprising a lower platen and an upper platen. Asshown in Figs. 3, 4 and 5, the lower platen 7 rests upon the roller 6and is movable longitudinally thereon. The

upper platen is superposed upon the lower platen 7 and is connected tothe lower platen by means of toggle links 9. A pair of these links arelocated near each end of the platens 7 and 8 and on each side of theplatens. yThe toggle links on each side are pivotally connected to eachother and to a longitudinally extending connecting rod 10, the ends ofwhich are upwardly and outwardly bent or inclined as at 11. rlhe middleof each rod 10 is provided with the outstanding lug 12, which in themovement of the platens is adapted to engage with upwardly projectingstuds or lugs 13 and 14 extending upwardly from the upper edges of thebars 4 of the frame or bed. Thus at the termination of a movement by theplatens in one direction the lug 12 will contact with the stud 18, whileat the termination of the movement of the platens in the other directionthe lug 12 will contact with the stud 14, thereby shifting theconnecting rod 10 in one direction or the other and therebystraightening out or folding the links 9, thus raising or lowering theupper platen 8.

Each of the lower platens 7 is provided at its ends with the outstandingears 15 through which pass the set screws 16, while each of the upperplatens is also provided at its ends with light ears 17 with which thescrews 1G are adapted to engage. These screws form adjustable stopslimiting the relative movement of the platens toward each other. Inorder to hold the upper and lower platens in alinement with each other,the ears 15 and 17 are pro-vided, one with a pin 18 projecting upwardlyfrom the ear and the other with a perforation through which the pin isadapted to pass. Vhen the platens are in operative position withrelation to each other, the pin 18 is always in engagement with theperforation in the opposed ear, the amount of movement of the platenstoward and away from each other being relatively slight and onlysufficient to permit the upper platen to raise above the Lipper surfaceof the pasteboard sheet passing between the platens. Stops 19 projectfrom the side of the upper platen, designed to limit the movement of thetoggle links 9 so that the links canno-t be moved into a position ofalinement which would tend to prevent the easy operation of the platens.

Each of the platens comprises a rectangular casing of metal, and locatedwithin this casing are resistance coils 20 or steam pipe coils, or anyother suitable means of heating the platen. The platen is preferablycovered upon its upper face by a plate 21. The detailed construction ofthese platens does not, however, form any particular part of my presentinvention as these platens may be formed in any suitable manner andheated by gas, electricity or steam as desired, the heating of theseplatens beingwell understood in the art.

As shown in Fig. 1, two pairs of platens 7 and 8 are used, but I do notwish to limit myself to any number of these platens as a greater or lessnumber might be used.

The platens are intended to have a reciprocating motion in oppositedirections so that as one pair of platens moves from the rear toward thefront of the machine, the other ofthe platens will simultaneously bemoving from the front toward the rear of the machine. The forward movingplaten grips the paper as it moves forward and feeds the paper forward,while the rearwardly moving platen at this time is open and movesrearward without contact-ing with the paper, or only contacting with itslightly. Thus a continuous feed will be given to the paper, while thepairs of platens will act alternately. Ihile I may use any desiredmechanism for the purpose of giving this reciprocating movement to theplatens and reciprocating the platens in opposite directions, I haveshown for this purpose a longitudinally extending shaft 22 which isprovided along its length with oppositely pitched screw threads 23 andY24. The lower platen 7 of each pair of platens is provided with adownwardly extending bracket 25 having thereon a sectional nut 26 whichengages with the screw threads. It will be seen that with thisconstruction the shaft 22 must be revolved alternately in oppositedirections, and that when this shaft is revolved in one direction thescrew threads 23 and 24 will cause one of the pairs of platens to moveforward while the other pair will move backward, and that when the shaftis reversed in the direction of its rotation the movement of the platenswill also be reversed. v

In order to provide for reversing the direction of rotation of the shaft22 at suitable intervals, I have provided the mechanism shown in Fig. 2.The shaft 22 is provided at its extremity with the bevel gearwheel 27which engages with a bevel gear wheel 28 on a transversely extendingshaft 29. This shaft carries upon it the loose pulleys 30 and 31 and thedriving pulley 32 which is fast on the shaft. The shaft is supc ported,of course, in suitable bearings 33 and 34. Over one of the pulleys, asfor instance the pulley 30, passes a crossed belt 35 driven from anysuitable pulley, not shown, and over the pulley wheel 31 passes thestraight belt 36. Connected to these belts are the shipper arms 37 ofany usual construction and designed to shift transversely so as to carryeither the crossed belt 35 into engagement with the pulley 32, or carrythe straight belt 36 into such engagement. As illustrated in Fig.l 2 thestraight belt 36 is engaged with the pulley 32 while the crossed belt 35is running on the loose pulley 30. The shipper arms 37 are connected toa transversely shiftable rod 38 mounted in suitable guides on the frameof the machine, having an upwardly projecting pin 39. Mounted in guides40 on one of the side plates or bars 4 is a longitudinally movable rod41. The extremity of this rod is downwardly bent as at 42, see Fig. 1,and laterally enlarged to form an angularly extending termination 43,this termination being provided with the angular cam slot 44 whichengages with the pin 39. It will be obvious that as the bar 41 isshifted in one direction or the other that the cam slot 44 engaging withthe pin 39 will reciprocate the shifter rod 38 in one direction oi' theother and thus shift the belts 35 and 36 on to or off from the pulley32, and that the shaft 29 will thus be driven alternately in oppositedirections.

As a means for shifting the rod 41 alternately in opposite directions, Iprovide the lower platen 7 of the pair of platens adjacent to the end ofthe machine with the outwardly project-ing spaced studs 45 and 46 andprovide the bar 41 with the upwardly that when the pair of platens moverearward the pin 45 will contact with the pin 47 when the platens havenearly reached the extremity of the stroke and that the pin will shiftthe pin 47 and the bar 41 toward the entrance end of the machine, andthat upon a. movement of the platens toward the exit end of the machinethe pin 46 will eventually contact with the pin 47 and thus shift thebar 41 in a reverse direction, thus alternately changing the directionof rotation of the shaft 22.

For the purpose of supporting the web of corrugated cellular pasteboard48 in the space between the two pairs of platens, I attach to the lowerplatens of one pair the canvas apron 49,- which apron passes over aroller 50 mounted upon the end face of the lower platen 7 of the otherpair of platens. The apron 49 extends over this roller 50 and isprovided on its free end with a weight 51. This keeps the apron 49always taut and takes up the slack in the apron when the pairs ofplatens move toward each other and permits the apron to increase inlength when the pairs of platens move away from each other. The cellularcardboard web 48 is thus supported upon the apron 49 at all times.

lVhile I of course do not wish to be limited to the use in connectionwith my machine of any special mechanism for feeding in and pasting thewebs of corrugated and plain paper, I have illustrated in Fig. 1 theplain webs 52 as passing into the machine over rollers 53 supported inany suitable manner, the corrugated sheet 54 passing through corrugatingrollers 55 and between paste-applying rollers 56.

The operation of my mechanism is as follows. Upon a rotation being givento the shaft in one direction, the rearmost pair of platens will becarried forward, the upper platen being lowered and pressing down uponthe webs of the paper between the two platens, the amount of thispressure being regulated by the set screws 16. As the rearmost platensmove forward they will of course carry the paper along with them andfeed it forward over the apron 49. Simultaneously with the forwardmovement of the rearmost platens the forward platens will move rearwardin the direction of the arrow in Fig: 1, the toggle links being turnednearly into alinement with each other and hence the upper platen beingraised a sufficient distance to permit theplaten to slip over the web48. As the pairs of platens move toward each other the apron 49 willroll down over the roller 50 to accommodate the increasing distancebetween the platens. Then the rearmost pair of platens has reached theextremity of its forward movement, the stud 12 on each connecting rod 10will contact with the lug 14 and the slight further forward movementwhich the platens have will of course cause the lug 14 to exert a pullupon the rod 1() which will straighten the toggle links and lifttheupper platen 8 of the pair off from the web 48. 'Vhen this has beenaccomplished the direction of rotation of the shaft 22 will be changedand the rearmost platen will move backward until such time as the stud12 on the connection 10 engages with the lug 13, whereupon the rod 10will be pulled to fold the links into the position shown on the righthand side of F ig. 1, thus bringing the upper down again upon the paper.Exactly the same movement will occur with the forward pair of platens,the uppermost platen of which will be raised or lowered as the lug 12 oneach of the connecting rods 10 engages with the studs 13 and 14. 'Itwill thus be seen that while the platens reciprocate in` oppositedirections to each other, the paper is given a continuous feed forward,and that the paper is subjected to pressure over its entire surface, thedegree of this pressure being regulated by the screws 16. It will alsobe seen that by altering the position of the stops 19 so as to limitthemovement of the links 9 the platens may be caused to open to an extentbarely sufficient to permit the platens to move backward over the paper,and that therefore the upper platen will exert an ironing action uponthe paper if desired. Under ordinary circumstances, however, the pinswill be so set that the links can open to their full extent, thusentirely raising the uppermost platen out of contact with the web orpaper 48, relieving all pressure upon the paper so that the platens maymove rearward with very little frictional contact with the paper. Itwill also be noted that my construction provides that the web 48 shallbe subjected to the pressure of the platens during the whole movement ofeach pair of platens forward, and that while the platens are movingforward the paper will be subjected to a uniform pressure throughout arelatively large area, which would not be the case were the paper merelypassing between pressing rolls. lVhere pressing rolls are used there isliable to be slight variations in the rolls which prevents a uniformpressure on the paper being secured. It will also be seen that thepressure upon the web 48 is exerted over a large surface and hence doesnot tend to crush the corrugations of the web 54, as it would if thepressure was exerted through a comparatively narrow area, as wheretransversely extending rolls are used. Furthermore, by my constructionthere is a clamping action exerted on the paper, which is not secured byother devices known to me.

While I have shown what I believe to be the best details of myconstruction, I do not wish to be limited to said details as variouschanges might be made without departing from the spirit of theinvention. Thus I do not wish to be limited to the exact means shown forreciprocating the pairs of platens as it will be perfectly obvious thatother mechanism might be used for this purpose without changing in anyway the action of the platens or their principal operation. Neither do Iwish to be limited to the exact construction of the platens themselvesas these may be formed in any desired way and provided with any suitablemeans for heating the same. It will be obvious that-my invention may bealso applied to feeding, drying and surfacing other forms of paper andpasteboard than the cellular corrugated board illustrated.

What I claim is:

l. In a machine for facing corrugated paper, opposed pressing platens,and means for separating said platens, moving them rearward over thepaper, closing the platens on the paper and moving the platens forwardto feed the paper.

2. In a machine for facing corrugated paper, opposed pressing platens,means for separating said platens, moving them rearward over the paper,closing the platens on the paper and moving the platens forward, andadjustable means for limiting the proximity of the platens in theirclosed position.

3. In a mechanism for facing corrugated paper, opposed pressing platens,means for heating the platens, and means for separating said platens,moving them rearward over the paper, closing the platens on the paper,thereby gripping the latter, and moving the platens forward. Y

4. In a machine for facing corrugated paper, opposed pressing platens,toggle joints connecting said platens at each end thereof and on eachside, longitudinally extending links connecting the toggle joints toeach other, means for moving the platens forward in contact with thepaper, means engaging with the links for straightening the toggle jointswhen the platens have reached their forward position, means for movingthe platens rearward out of contact with the paper, and means forengaging the link and folding said toggle joints to bring the platensagain into gripping contact with the paper when the platens have reachedthe limit of their rearward movement.

5. In a machine for facing corrugated paper, a bed plate, a pair ofupper and lower platens moving over said bed plate, toggle jointslocated on each side of the platens and at each end thereof, alongitudinally extending link on each side of the platens connecting thetoggle joints of that side, each of said links having an outwardlyprojecting stud, spaced stops disposed on the bed plate with which saidstuds engage, the stops being located at opposite ends of the path oftravel of the platens, and means for reciprocating said platens on thebed plate.

6. In a mechanism for facing corrugated paper, a bed plate, antifrictionrollers mounted on the bed plate, a pair of upper and lower platenssupported on said rollers and movable thereover, means for reciprocatingsaid pair of platens, and means for lifting the upper platen from thelower platen as the platens move rearward on the bed plate, and forlowering the upper platen toward the lower platen as the platens moveforward.

7. In a machine for facing corrugated paper, a plurality of pairs ofpressing platens, each pair consisting of opposed upper and lowerplatens, means for reciprocating said pairs of platens in oppositedirections to each other, and means for causing the upper platen of eachpair to lift as the pairs of platens move rearward and for lowering theupper platen into gripping Contact with the paper to be faced as thepairs of platens move forward.

8. In a machine for facing corrugated paper, a plurality of pairs ofpressing platens, each pair consisting of upper and lower platens, meansfor heating the platens of each pair of platens, means for reciprocatingeach pair of platens along the line of the paper being faced, and meapsfor causing the upper platen of each pair to lower as it moves forward,thus gripping the paper and to lift as it moves rearward, thus releasingthe paper.

9. In a mechanism for facing corrugated paper, a bed, oppositelydisposed antifriction rollers on the bed, said rollers being spaced fromeach other to leave a longitudinally extending opening along the middleof the bed, a plurality of pairs of pressing platens supported on therollers and extending across t-he bed, each of said pairs comprisingupper and lower platens, the lowermost platen of each pair having adownwardly projecting bracket extending through the longitudinal openingin the bed, toggle joints connecting the upper platen of each pair tothe lower platen, means engaging with the brackets of the lower platenst'o reciprocate the platens, means for raising the upper platens fromthe lower as the platens move rearward, and means for lowering the upperplatens toward the lower platens and into gripping contact with thepaper being corrugated upon the forward movement of the platens.

10. In a mechanism for facing corrugated paper, oppositely disposedcoacting heating and pressing platens, and means for reciprocating saidplatens.

11. In a mechanism for facing corrugated paper, a bed, a plurality ofpairs of pressing platens mounted on the bed, each pair consisting of anupper and lower platen,

the lowerniost platen of each pair having a downwardly extendingbracket, oppositely disposed toggle joints located on each side of theplatens and connecting the upper with the lower platen of each pair, ashaft mounted below the bed and having screw threaded engagement withthe brackets of each lower platen, means for rotating the shaftalternately in opposite directions, the screw threads engaging with thebracket of one platen being reversely pitched to the s'crew threadsengaging the neXt adjacent platen,

means for straightening the toggle joints of each platen as the platensreach the end of their forward movement, and means for 15 folding thetoggle joints of each platen as the platens reach the end of theirrearward movement.

In testimony whereof, 1 affix my signature

